Dynamics of the BCS-BEC crossover in a degenerate fermi gas

Dynamics of the BCS-BEC crossover in a degenerate fermi gas

We study the short-time dynamics of a degenerate Fermi gas positioned near a Feshbach resonance following an abrupt jump in the atomic interaction resulting from a change of magnetic field. We investigate the dynamics of the condensate order parameter and pair wave function for a range of field stre...

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Veröffentlicht in:Physical review letters 2005-05, Vol.94 (17), p.170402.1-170402.4, Article 170402
Hauptverfasser: SZYMANSKA, M. H, SIMONS, B. D, BURNETT, K
Format: Artikel
Sprache:eng
Schlagworte:
ATOMS
BCS THEORY
BOSE-EINSTEIN CONDENSATION
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Exact sciences and technology
FERMI GAS
FERMIONS
LITHIUM 6
MAGNETIC FIELDS
MOLECULES
ORDER PARAMETERS
OSCILLATIONS
Physics
POTASSIUM 40
RESONANCE
WAVE FUNCTIONS
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container_issue 17
container_start_page 170402.1
container_title Physical review letters
container_volume 94
creator SZYMANSKA, M. H
SIMONS, B. D
BURNETT, K
description We study the short-time dynamics of a degenerate Fermi gas positioned near a Feshbach resonance following an abrupt jump in the atomic interaction resulting from a change of magnetic field. We investigate the dynamics of the condensate order parameter and pair wave function for a range of field strengths. When the jump is sufficient to span the BCS to Bose-Einstein condensation crossover, we show that the rigidity of the momentum distribution precludes any atom-molecule oscillations in the entrance channel dominated resonances observed in 40K and 6Li. Focusing on material parameters tailored to the 40K Feshbach resonance at 202.1 G, we comment on the integrity of the fast sweep projection technique as a vehicle to explore the condensed phase in the crossover region.
doi_str_mv 10.1103/physrevlett.94.170402
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source American Physical Society Journals
subjects ATOMS
BCS THEORY
BOSE-EINSTEIN CONDENSATION
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Exact sciences and technology
FERMI GAS
FERMIONS
LITHIUM 6
MAGNETIC FIELDS
MOLECULES
ORDER PARAMETERS
OSCILLATIONS
Physics
POTASSIUM 40
RESONANCE
WAVE FUNCTIONS
title Dynamics of the BCS-BEC crossover in a degenerate fermi gas
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